X-Git-Url: https://git.lyx.org/gitweb/?a=blobdiff_plain;f=src%2Fmathed%2FMathStream.h;h=b7e79434af1c02bea66f460abc4b39e215fe7648;hb=3a544072a522845b192594dd2ab11fcb1fc80eeb;hp=2262ad9df88bc3c71b94270c6ddad38f168795dd;hpb=00e305c9d9bd8b0ff54b6c58adb6192d5934ed60;p=lyx.git

diff --git a/src/mathed/MathStream.h b/src/mathed/MathStream.h
index 2262ad9df8..b7e79434af 100644
--- a/src/mathed/MathStream.h
+++ b/src/mathed/MathStream.h
@@ -4,7 +4,7 @@
  * This file is part of LyX, the document processor.
  * Licence details can be found in the file COPYING.
  *
- * \author André Pönitz
+ * \author André Pönitz
  *
  * Full author contact details are available in file CREDITS.
  */
@@ -12,21 +12,22 @@
 #ifndef MATH_MATHMLSTREAM_H
 #define MATH_MATHMLSTREAM_H
 
+#include "InsetMath.h"
 
-// Please keep all four streams in one file until the interface has
-// settled.
+#include "TexRow.h"
+#include "texstream.h"
 
-
-#include "MetricsInfo.h"
-#include "support/docstream.h"
-#include "support/docstring.h"
+#include "support/Changer.h"
+#include "support/strfwd.h"
+#include "support/unique_ptr.h"
 
 
 namespace lyx {
 
-class MathArray;
+class Encoding;
 class InsetMath;
 class MathAtom;
+class MathData;
 
 //
 // LaTeX/LyX
@@ -35,9 +36,21 @@ class MathAtom;
 class WriteStream {
 public:
 	///
-	WriteStream(odocstream & os, bool fragile, bool latex);
+	enum OutputType {
+		wsDefault,
+		wsDryrun,
+		wsPreview
+	};
+	///
+	enum UlemCmdType {
+		NONE,
+		UNDERLINE,
+		STRIKEOUT
+	};
 	///
-	explicit WriteStream(odocstream & os);
+	explicit WriteStream(otexrowstream & os, bool fragile = false,
+	                     bool latex = false, OutputType output = wsDefault,
+	                     Encoding const * encoding = 0);
 	///
 	~WriteStream();
 	///
@@ -47,34 +60,94 @@ public:
 	///
 	bool latex() const { return latex_; }
 	///
-	odocstream & os() { return os_; }
+	OutputType output() const { return output_; }
+	///
+	otexrowstream & os() { return os_; }
+	///
+	TexRow & texrow() { return os_.texrow(); }
 	///
 	bool & firstitem() { return firstitem_; }
 	///
 	void addlines(unsigned int);
+	/// record whether we can write an immediately following newline char
+	void canBreakLine(bool breakline) { canbreakline_ = breakline; }
+	/// tell whether we can write an immediately following newline char
+	bool canBreakLine() const { return canbreakline_; }
+	/// record whether we have to take care for striking out display math
+	void strikeoutMath(bool mathsout) { mathsout_ = mathsout; }
+	/// tell whether we have to take care for striking out display math
+	bool strikeoutMath() const { return mathsout_; }
+	/// record which ulem command type we are inside
+	void ulemCmd(UlemCmdType ulemcmd) { ulemcmd_ = ulemcmd; }
+	/// tell which ulem command type we are inside
+	UlemCmdType ulemCmd() const { return ulemcmd_; }
 	/// writes space if next thing is isalpha()
 	void pendingSpace(bool how);
 	/// writes space if next thing is isalpha()
 	bool pendingSpace() const { return pendingspace_; }
+	/// tell whether to write the closing brace of \ensuremath
+	void pendingBrace(bool brace);
+	/// tell whether to write the closing brace of \ensuremath
+	bool pendingBrace() const { return pendingbrace_; }
+	/// tell whether we are in text mode or not when producing latex code
+	void textMode(bool textmode);
+	/// tell whether we are in text mode or not when producing latex code
+	bool textMode() const { return textmode_; }
+	/// tell whether we are allowed to switch mode when producing latex code
+	void lockedMode(bool locked);
+	/// tell whether we are allowed to switch mode when producing latex code
+	bool lockedMode() const { return locked_; }
+	/// tell whether to use only ascii chars when producing latex code
+	void asciiOnly(bool ascii);
+	/// tell whether to use only ascii chars when producing latex code
+	bool asciiOnly() const { return ascii_; }
+	/// LaTeX encoding
+	Encoding const * encoding() const { return encoding_; }
+
+	/// Temporarily change the TexRow information about the outer row entry.
+	Changer changeRowEntry(TexRow::RowEntry entry);
+	/// TexRow::starts the innermost outer math inset
+	/// returns true if the outer row entry will appear at this line
+	bool startOuterRow();
 private:
 	///
-	odocstream & os_;
+	otexrowstream & os_;
 	/// do we have to write \\protect sometimes
 	bool fragile_;
-	/// are we at the beginning of an MathArray?
+	/// are we at the beginning of an MathData?
 	bool firstitem_;
 	/// are we writing to .tex?
 	int latex_;
+	/// output type (default, source preview, instant preview)?
+	OutputType output_;
 	/// do we have a space pending?
 	bool pendingspace_;
+	/// do we have a brace pending?
+	bool pendingbrace_;
+	/// are we in text mode when producing latex code?
+	bool textmode_;
+	/// are we allowed to switch mode when producing latex code?
+	bool locked_;
+	/// should we use only ascii chars when producing latex code?
+	bool ascii_;
+	/// are we allowed to output an immediately following newline?
+	bool canbreakline_;
+	/// should we take care for striking out display math?
+	bool mathsout_;
+	/// what ulem command are we inside (none, underline, strikeout)?
+	UlemCmdType ulemcmd_;
 	///
 	int line_;
+	///
+	Encoding const * encoding_;
+	/// Row entry we are in
+	TexRow::RowEntry row_entry_;
 };
 
 ///
 WriteStream & operator<<(WriteStream &, MathAtom const &);
 ///
-WriteStream & operator<<(WriteStream &, MathArray const &);
+WriteStream & operator<<(WriteStream &, MathData const &);
 ///
 WriteStream & operator<<(WriteStream &, docstring const &);
 ///
@@ -86,6 +159,134 @@ WriteStream & operator<<(WriteStream &, int);
 ///
 WriteStream & operator<<(WriteStream &, unsigned int);
 
+/// ensure correct mode, possibly by opening \ensuremath or \lyxmathsym
+bool ensureMath(WriteStream & os, bool needs_mathmode = true,
+                bool macro = false, bool textmode_macro = false);
+
+/// ensure the requested mode, possibly by closing \ensuremath or \lyxmathsym
+int ensureMode(WriteStream & os, InsetMath::mode_type mode, bool locked, bool ascii);
+
+
+/**
+ * MathEnsurer - utility class for ensuring math mode
+ *
+ * A local variable of this type can be used to either ensure math mode
+ * or delay the writing of a pending brace when outputting LaTeX.
+ * A LyX InsetMathMacro is always assumed needing a math mode environment, while
+ * no assumption is made for macros defined through \newcommand or \def.
+ *
+ * Example 1:
+ *
+ *      MathEnsurer ensurer(os);
+ *
+ * If not already in math mode, inserts an \ensuremath command followed
+ * by an open brace. This brace will be automatically closed when exiting
+ * math mode. Math mode is automatically exited when writing something
+ * that doesn't explicitly require math mode.
+ *
+ * Example 2:
+ *
+ *      MathEnsurer ensurer(os, false);
+ *
+ * Simply suspend writing a closing brace until the end of ensurer's scope.
+ *
+ * Example 3:
+ *
+ *      MathEnsurer ensurer(os, needs_mathmode, true, textmode_macro);
+ *
+ * This form is mainly used for math macros as they are treated specially.
+ * In essence, the macros defined in the lib/symbols file and tagged as
+ * textmode will be enclosed in \lyxmathsym if they appear in a math mode
+ * environment, while macros defined in the preamble or ERT are left as is.
+ * The third parameter must be set to true and the fourth parameter has also
+ * to be specified. Only the following 3 different cases are handled.
+ *
+ * When the needs_mathmode parameter is true the behavior is as in Example 1.
+ * This is the case for a LyX InsetMathMacro or a macro not tagged as textmode.
+ *
+ * When the needs_mathmode and textmode_macro parameters are both false the
+ * macro is left in the same (text or math mode) environment it was entered.
+ * This is because it is assumed that the macro was designed for that mode
+ * and we have no way to tell the contrary.
+ * This is the case for macros defined by using \newcommand or \def in ERT.
+ *
+ * When the needs_mathmode parameter is false while textmode_macro is true the
+ * macro will be enclosed in \lyxmathsym if it appears in a math mode environment.
+ * This is the case for the macros tagged as textmode in lib/symbols.
+ */
+class MathEnsurer
+{
+public:
+	///
+	explicit MathEnsurer(WriteStream & os, bool needs_mathmode = true,
+	                     bool macro = false, bool textmode_macro = false)
+		: os_(os), brace_(ensureMath(os, needs_mathmode, macro, textmode_macro)) {}
+	///
+	~MathEnsurer() { os_.pendingBrace(brace_); }
+private:
+	///
+	WriteStream & os_;
+	///
+	bool brace_;
+};
+
+
+/**
+ * ModeSpecifier - utility class for specifying a given mode (math or text)
+ *
+ * A local variable of this type can be used to specify that a command or
+ * environment works in a given mode. For example, \mbox works in text
+ * mode, but \boxed works in math mode. Note that no mode changing commands
+ * are needed, but we have to track the current mode, hence this class.
+ * This is only used when exporting to latex and helps determining whether
+ * the mode needs being temporarily switched when a command would not work
+ * in the current mode. As there are cases where this switching is to be
+ * avoided, the optional third parameter can be used to lock the mode.
+ * When the mode is locked, the optional fourth parameter specifies whether
+ * strings are to be output by using a suitable ascii representation.
+ *
+ * Example 1:
+ *
+ *      ModeSpecifier specifier(os, TEXT_MODE);
+ *
+ * Sets the current mode to text mode and allows mode switching.
+ *
+ * Example 2:
+ *
+ *      ModeSpecifier specifier(os, TEXT_MODE, true);
+ *
+ * Sets the current mode to text mode and disallows mode switching.
+ *
+ * Example 3:
+ *
+ *      ModeSpecifier specifier(os, TEXT_MODE, true, true);
+ *
+ * Sets the current mode to text mode, disallows mode switching, and outputs
+ * strings as ascii only.
+ *
+ * At the end of specifier's scope the mode is reset to its previous value.
+ */
+class ModeSpecifier
+{
+public:
+	///
+	explicit ModeSpecifier(WriteStream & os, InsetMath::mode_type mode,
+				bool locked = false, bool ascii = false)
+		: os_(os), oldmodes_(ensureMode(os, mode, locked, ascii)) {}
+	///
+	~ModeSpecifier()
+	{
+		os_.textMode(oldmodes_ & 0x01);
+		os_.lockedMode(oldmodes_ & 0x02);
+		os_.asciiOnly(oldmodes_ & 0x04);
+	}
+private:
+	///
+	WriteStream & os_;
+	///
+	int oldmodes_;
+};
+
 
 
 //
@@ -95,23 +296,30 @@ WriteStream & operator<<(WriteStream &, unsigned int);
 class MTag {
 public:
 	///
-	MTag(docstring const tag) : tag_(tag) {}
+	MTag(char const * const tag, std::string attr = "")
+		: tag_(tag), attr_(attr) {}
 	///
-	MTag(char const * const tag) : tag_(from_ascii(tag)) {}
+	char const * const tag_;
 	///
-	docstring const tag_;
+	std::string attr_;
 };
 
 class ETag {
 public:
 	///
-	ETag(docstring const tag) : tag_(tag) {}
+	ETag(char const * const tag) : tag_(tag) {}
 	///
-	ETag(char const * const tag) : tag_(from_ascii(tag)) {}
-	///
-	docstring const tag_;
+	char const * const tag_;
 };
 
+
+/// Throw MathExportException to signal that the attempt to export
+/// some math in the current format did not succeed. E.g., we can't
+/// export xymatrix as MathML, so that will throw, and we'll fall back
+/// to images.
+class MathExportException : public std::exception {};
+
+
 class MathStream {
 public:
 	///
@@ -126,7 +334,17 @@ public:
 	int & tab() { return tab_; }
 	///
 	friend MathStream & operator<<(MathStream &, char const *);
+	///
+	void defer(docstring const &);
+	///
+	void defer(std::string const &);
+	///
+	docstring deferred() const;
+	///
+	bool inText() const { return in_text_; }
 private:
+	///
+	void setTextMode(bool t) { in_text_ = t; }
 	///
 	odocstream & os_;
 	///
@@ -134,13 +352,17 @@ private:
 	///
 	int line_;
 	///
-	char lastchar_;
+	bool in_text_;
+	///
+	odocstringstream deferred_;
+	///
+	friend class SetMode;
 };
 
 ///
 MathStream & operator<<(MathStream &, MathAtom const &);
 ///
-MathStream & operator<<(MathStream &, MathArray const &);
+MathStream & operator<<(MathStream &, MathData const &);
 ///
 MathStream & operator<<(MathStream &, docstring const &);
 ///
@@ -148,11 +370,98 @@ MathStream & operator<<(MathStream &, char const *);
 ///
 MathStream & operator<<(MathStream &, char);
 ///
+MathStream & operator<<(MathStream &, char_type);
+///
 MathStream & operator<<(MathStream &, MTag const &);
 ///
 MathStream & operator<<(MathStream &, ETag const &);
 
 
+/// A simpler version of ModeSpecifier, for MathML
+class SetMode {
+public:
+	///
+	explicit SetMode(MathStream & os, bool text);
+	///
+	~SetMode();
+private:
+	///
+	MathStream & os_;
+	///
+	bool was_text_;
+};
+
+
+class HtmlStream {
+public:
+	///
+	explicit HtmlStream(odocstream & os);
+	///
+	void cr();
+	///
+	odocstream & os() { return os_; }
+	///
+	int line() const { return line_; }
+	///
+	int & tab() { return tab_; }
+	///
+	friend HtmlStream & operator<<(HtmlStream &, char const *);
+	///
+	void defer(docstring const &);
+	///
+	void defer(std::string const &);
+	///
+	docstring deferred() const;
+	///
+	bool inText() const { return in_text_; }
+private:
+	///
+	void setTextMode(bool t) { in_text_ = t; }
+	///
+	odocstream & os_;
+	///
+	int tab_;
+	///
+	int line_;
+	///
+	bool in_text_;
+	///
+	odocstringstream deferred_;
+	///
+	friend class SetHTMLMode;
+};
+
+///
+HtmlStream & operator<<(HtmlStream &, MathAtom const &);
+///
+HtmlStream & operator<<(HtmlStream &, MathData const &);
+///
+HtmlStream & operator<<(HtmlStream &, docstring const &);
+///
+HtmlStream & operator<<(HtmlStream &, char const *);
+///
+HtmlStream & operator<<(HtmlStream &, char);
+///
+HtmlStream & operator<<(HtmlStream &, char_type);
+///
+HtmlStream & operator<<(HtmlStream &, MTag const &);
+///
+HtmlStream & operator<<(HtmlStream &, ETag const &);
+
+
+class SetHTMLMode {
+public:
+	///
+	explicit SetHTMLMode(HtmlStream & os, bool text);
+	///
+	~SetHTMLMode();
+private:
+	///
+	HtmlStream & os_;
+	///
+	bool was_text_;
+};
+
 
 //
 // Debugging
@@ -172,7 +481,7 @@ private:
 ///
 NormalStream & operator<<(NormalStream &, MathAtom const &);
 ///
-NormalStream & operator<<(NormalStream &, MathArray const &);
+NormalStream & operator<<(NormalStream &, MathData const &);
 ///
 NormalStream & operator<<(NormalStream &, docstring const &);
 ///
@@ -203,7 +512,7 @@ private:
 ///
 MapleStream & operator<<(MapleStream &, MathAtom const &);
 ///
-MapleStream & operator<<(MapleStream &, MathArray const &);
+MapleStream & operator<<(MapleStream &, MathData const &);
 ///
 MapleStream & operator<<(MapleStream &, docstring const &);
 ///
@@ -236,7 +545,7 @@ private:
 ///
 MaximaStream & operator<<(MaximaStream &, MathAtom const &);
 ///
-MaximaStream & operator<<(MaximaStream &, MathArray const &);
+MaximaStream & operator<<(MaximaStream &, MathData const &);
 ///
 MaximaStream & operator<<(MaximaStream &, docstring const &);
 ///
@@ -269,7 +578,7 @@ private:
 ///
 MathematicaStream & operator<<(MathematicaStream &, MathAtom const &);
 ///
-MathematicaStream & operator<<(MathematicaStream &, MathArray const &);
+MathematicaStream & operator<<(MathematicaStream &, MathData const &);
 ///
 MathematicaStream & operator<<(MathematicaStream &, docstring const &);
 ///
@@ -299,7 +608,7 @@ private:
 ///
 OctaveStream & operator<<(OctaveStream &, MathAtom const &);
 ///
-OctaveStream & operator<<(OctaveStream &, MathArray const &);
+OctaveStream & operator<<(OctaveStream &, MathData const &);
 ///
 OctaveStream & operator<<(OctaveStream &, docstring const &);
 ///
@@ -311,6 +620,9 @@ OctaveStream & operator<<(OctaveStream &, char);
 ///
 OctaveStream & operator<<(OctaveStream &, int);
 
+
+docstring convertDelimToXMLEscape(docstring const & name);
+
 } // namespace lyx
 
 #endif